Trebl vs MelodySlotMachine
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Trebl
Easily read sheet music by hearing notes played or visualizing them on a guitar or piano. This app helps musicians save time by quickly identifying correct notes and exploring variations.
- Hear selected notes played
- Visualize notes on guitar fretboard
- Visualize notes on piano keys
- Select single or multiple notes
- Switch between sharps and flats
- Show/hide fretboard segments
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With Trebl, reading sheet music is simple. This app allows the user to select any note or notes from a music staff, and either hear the notes played out, or visualize the notes in the context of a guitar or piano. It is simple to use and can save musicians a great deal of precious time spent stumbling around incorrect notes. Trebl is flexible for your needs. Select one note, or select many, the choice is up to you. You can easily switch to sharps and flats by changing modes and selecting your desired note. The user can also show and hide segments of the fretboard to discover a wide variety of variations to play their selected notes. Note: -App icon art : Music by Ilsur Aptukov from the Noun Project
MelodySlotMachine
Create new melody combinations by rearranging variations using slot dials. This AI-powered tool analyzes musical structure to generate new compositions, aiding composers in projects requiring many variations. Explore next-generation music production and consumption.
- Dial-based melody variation selection
- Grid tile operation for timeline visualization
- Melody shuffle via device shake
- Song and part selection
- AI-driven musical structure analysis
- Next-generation music creation
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Melody Slot Machine is an application developed by RIKEN towards the integration of music and AI. You can create new melody combinations by rearranging melody variations using slot dials. When the composer composes melody variations, the structure of the melody is analyzed using a theory of music known as generative theory of tonal music (GTTM). Even if the melody switches to another variation in the middle, the structure will not be disrupted. You can expand the possibilities of composition with Melody Slot Machine. - Dial operation By rotating the dials similar to a slot machine, you can select a melody from multiple variations. The dial scrolls to the left as the performance progresses, and the leftmost dial on the screen represents the score of the performance currently being played. - Grid tile operation The horizontal grid tiles below the dials show the dial changes throughout the song. Swipe up to expand and use the elongated grid tile. - Melody shuffle When you shake your iPhone, all the dials rotate simultaneously, similar to when you pull the lever on a slot machine and stop at a random combination. - Song selection / Part switching You can select a song by pressing the musical note button. For songs containing multiple parts, you can press the button to switch between parts. - Development history The Music Information Intelligence Team, part of the RIKEN Center for Advanced Intelligence Project, is exploring potential new ways of creating and listening to music using AI. The Melody Slot Machine is an example of next-generation music production and consumption in which AI automatically analyzes the structure of a melody and resynthesizes a new melody using the obtained structure. We aim to support composers in projects that require many variations, such as in movies and games. The app is available to the public to gauge the overall interest in such a method of music creation. We ask that users the app who are prompted to fill out a questionnaire to please submit their responses. We plan to add songs in the future. If you are interested in the app and technology, please contact us at the support URL.
Screenshots
Verdict
The clearest difference is ratings volume: Trebl at 4 against MelodySlotMachine's 1. Trebl also leads on iOS requirement (9.3 vs 11.4). MelodySlotMachine's advantage is device support. On price, rating, in-app purchases and monetization model there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 5.0 for Trebl against 5.0 for MelodySlotMachine. Both are backed by a comparable volume of ratings — 4 and 1 respectively.
| Parameter | Trebl | MelodySlotMachine |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (4 ratings) | 5.0 (1 ratings) |
| Number of ratings | 4 — better | 1 |
| Update frequency | — | Weekly |
| Ads | — | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | — | iPhone, iPod — better |
| Requires iOS | 9.3 — better | 11.4 |
| Further details — not scored | ||
| Size | 14 MB | 192 MB |
| Age rating | 4+ | 4+ |
| Developer | Samraj Kalkat | newforestar co,.ltd |
In-app purchases
Trebl
No in-app purchases
MelodySlotMachine
No in-app purchases









